A spring-loaded guided core AC-LVDT is an air-extended, spring retracted LVDT offering consistent measurement for dimensional gauging, factory automation, and similar position measurement applications.

Linear variable differential transformers (LVDTs) are a common type of linear position sensor widely used in electromechanical systems today. An LVDT consists of two basic elements: a stationary coil assembly and a movable core or armature. Because it’s a transformer, an LVDT is fundamentally an AC-in/AC-out device. However, some LVDTs have electronics built in to make them DC-in/DC-out devices. This gives rise to the terms “AC-LVDTs” and “DC-LVDTs.”

Furthermore, because an LVDT is usually connected differentially, it has a natural null point in the magnitude of its AC output. And because an LVDT typically has no end position stops, the null position, located in the middle of the range of motion of the LVDT’s core, is the “stake in the ground” for determining core position and is always specified on an LVDT data sheet.

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